Sheet feed rotary printing press



Jan. 23, 1934. H. M. BARBER SHEET FEED ROTARY PRINTING PRESS Filed July 12, 1932 2 Sheets-Sheet l INVENTOR 1 ATTORNEYS Jan. 23, 1934. H. M. BARBER SHEET FEED yROTARY PRINTING PRESS 2' s'neetsheet 2 Filed July 12, 1952 m INVENTOR Mm ATTORNEYS Patented `Fan. 23, 1934 SHEET FEED ROTARY PRINTING PRESS Howard M. Barber, Pawcatuek, Conn., assignor to C. B. Cottrell & Sons Company, Westerly, B. I. l a corporation of Delaware Application July 12, 1932. Astrati No. 622,053

19 claims. (ci. iol-174) One feature of my invention is directed to means whereby sheets fed from two separate sources of supply may be fed to a common rotary carrier to be transferred thereby to an impression cylinder having an odd number of impression surfaces.

Another feature of my invention is directed to means for causing the` impression cylinder to retain a sheet thereon beyond its point of delivery upon the failure of the rotary transfer carrier to take a sheet from either feeder, thus causing the sheet on the impression cylinder to receive a secon'd impression as it is carried through the press and thereby protect the im- 18 pression cylinder packing from receiving said last named impression.

A practical embodiment of my invention is represented in the accompanying drawings, in which Fig. 1 represents a detail side elevation of a sheet feed rotary printing press with my improvements applied thereto;

Fig. 2 represents a detail cross section taken in the plane of the line II-II of Fig. 1, looking in the direction of the arrows;

Fig. 3 represents a detail cross section taken in the plane of the line III-111 of Fig. 1, looking in the direction of the arrows;

Fig. 4 represents a diagrammatic side view with the parts in the positions they assume as ao one sheet is being transferred to one impression surface of the impression cylinder and another sheet is being delivered from said impression surface;

Fig. 5 represents a similar view with the cylinders advanced slightly in their movements to illustrate the means for automatically controlling the operation of the several cylinder grippers upon the failure of a sheet to be taken by the rotary transfer carrier. l

Five form cylinders 1, 2, 3, 4, 5 are shown arranged around the upper side of their impression cylinder 6. This impression cylinder is herein shown as having three impression surfaces '7, 8, 9 and their three sets of sheet grippers 10, 11, 12,

the distances between the grippers equaling the circumferences of the form cylinders.

Two sources of sheet supply are herein shown as sheet feed tables 13, 14, arranged one above the other on the same side of the impression cylinder, the upper sheet feed table being provided with a sheet stop 15 mounted on its rock shaft 16 and the lower sheet feed table being provided with the sheet stop 17 mounted on its rock shaft 18.

Two rotary sheet feed carriers 19, 20 arey arranged to feed the sheets from their respective upper and lower sheet feed tables 13 and 14 to the common rotary transfer carrier 21. The upper rotary sheet carrier 19 is provided with a set the set of grippers 25 on the rotary transfer carrier 21.

The sets of grippers 23 and 25 on the rotary transfer carrier are arranged diametrically opposite each other and they are arranged to transfer successive sheet-s to successive impression surfaces of the impression cylinder 6.v 75

Rotary cams 26, 27 are driven from'the shafts of their respective rotary sheet feed carriers 19, 20 for controlling the operation of their respective sheet stops 15, 17 through the rock levers 28, 29, to feed the sheets to their grippers 22, 24 re- 80 spectively every second ,revolutionof the rotary sheet feed carriers;-'-'A`ny well known or approved means may be employed for feeding the sheets from the'rotary sheet feed carriers 19 and 20 to their respective grippers on the rotary sheet transfer carrier 21.

The rotary sheet delivery carrier 30 is provided with a set of grippers 31 arranged to receive the successive printed sheets from the sets of grippers 10, 11 and 12 of the impression cylinder and 90 deliver said sheets to a suitable point, such as an endless delivery carrier 32.

The means which I have shown for controlling the transfer of the successive sheets on the rotary transfer carrier 21 to their successive impres- 95 sion surfaces of the impression cylinderis: as follows: A movable cam 33 for controlling the operation of the grippers 23 and-25 at their transfer point is connected by a rock lever 34 to a movable cam 35 pivoted at 36 for controlling the operation 100 of the grippers 10, 11 and l2 of the impression cylinder for taking the successive sheets from the rotary transfer carrier 21.- This movable cam 35 is also connected by a rock lever 37 to a movable cam 38 which controls the operation of the grip- 105 pers 31 of-the rotary delivery carrier 30 to take the sheets from the successive impression cylinder grippers 10, 11 and 12. v

The means,v which I haveA shown whereby the failure of'aflsheet tobe taken'by the rotary trans- 11o is provided with a stud or roller 42' riding on a deliver the sheets.

three point cam 43 carried by the impression cylinder. The control lever has also an arm 44 which is arranged in position to be engaged by an electrically operated latch 45. The operation of this latch is controlled through an electric circuit 46 by a detector roller 47 carried by an arm 48 on the rock shaft 49 adjacent the periphery of the rotary sheet transfer carrier 21. Another arm 50 of this rock shaft 49 is connected by a ro'd 51 to a rock lever 52 carrying a stud or roller 53 which rides on a cam 54 on the rotary transfer carrier 2l. This cam 54 has two diametrically opposed low portions 55, 56 which permit the detector roller 47 to drop onto the surface of the transfer carrier immediately back of the sets of grippers 23 or 25 should a sheet not be carried by either of said sets of grippers. The instant that the detector roller 47 contacts with the periphery of the rotary carrier 2l, the electrical circuit is completed, causing the latch 45 `to be withdrawn from its engagement, with the arm 44, thereby causing the control lever to move the cams 33, 35 and 38 into position to cause the grippers to remain closed as they pass each other and to cause the previously printed sheet to remain on the impression cylinder to take more or less of the second impression as the press is stopping. The three point cam 43 on the impression cylinder serves, because ofv its coaction with the stud or roller 42, to return the control lever and thereby the cams to their normal position so that the electric latch 45 will again engage the arm 44 of the control lever and the cams ,thereby be4 held in their properv operative positions to cause theseveral sets of grippers to feed and From the above description it will be seen that vI have provided means whereby a y previously printed sheet is retained'on the .impression cylinder beyond the delivery point for said sheet t -when the rotary transfer carrier fails-to take a sheet from either of its two sources of sheet supply/'said means being shown herein as electrically operateda y -It isf evident that .various changes may be resorted y`t'o in the construction, form and arrangement "of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular em bodiment herein shown and described, but

' What I clim is: 1

l. In a sheet feed rotary printing press, an pression cylinder having a plurality of impression l i surfaces, a rotary carrier arranged to alternately take sheets directly from two sources and transfer thesheets directly to successive impression cylinder surfaces, and means, controlled by the.

failure of a' sheet to be taken by the transfer carrier,l for causing the impression cylinder to re Vtain a 'previously printed sheet thereon beyond its delivery point.

2; In a lsheet feed rotary printing press, an iin--l pression cylinder having a plurality of impression Apression cylinder to retain a previously printed sheet thereon beyond its delivery point.

3 In a sheet feed rotary printing press, an impression cylinder, arotary carrier arranged to take sheets from two sources and transfer the sheets successively to the impression cylinder,

.and electrically operated means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a previously printed sheet thereon beyond its vdelivery point.

4. In a sheet feed rotary printing press, an impression cylinder, a rotary carrier arranged to take sheets at different points thereon from two sources and transfer the sheets successively to the impression cylinder, and electrically operated means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a previously printed sheet thereon beyondl its delivery point.

5. In a sheet feed rotary printing press, an impression cylinder having a plurality of impression surfaces, its grippers, a rotary carrier, its grippers arranged to alternately take sheets directly from two sources and transfer the sheets directly to successive impression cylinder grippers, a rotary delivery carrier, its grippers arranged to take the sheets from the impression cylinder grippers, and means, controlled by the failure of a sheet to be taken by the grippers of the transfer carrier,

fer carrier for ycausing ythe grippers on the trans.

fer carrier, the impression cylinder and the delivery carrier to fail to coact.

7. In a sheet feed rotary printing press, an impression cylinder having a plurality of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, a common rotary transfer cylinder arranged to alternately take the sheets directly from the sheet feed carriers and transfer them directly to successive impression cylinder surfaces, and means controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a previously printed sheet thereon beyond its delivery point.

two rotary sheet feed carriers, a common rotary 9. In a sheet feed rotary printing press, an iran l pression cylinder ving a pluralityoi imprsion surfaces, two sources of sheet supply, two rotary sheet feed carriers, a common rotary transfer cylinder arranged to alternately take the sheets directly from the sheet feed carriers at different points on the transfer carrier and transfer the sheets directly to successive impression cylinder surfaces, and means controlled by ,the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a printed sheet thereon beyond its delivery point.

10. In a sheet feed rotary printing press, an impression cylinder, two sources of sheet supply, two rotary sheet feed carriers, a common rotary transfer cylinder arranged to take the sheets from the sheet feed carriers at different points on the transfer carrier and transfer the sheets to the impression cylinder, and electrically operated means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a printed sheet thereon beyond its delivery point.

ll. In a sheet feed rotary printing press, an impression cylinder' having an odd number of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, and a common rotary sheet transfer carrier arranged to alternately take the sheets directly from the two sheet feed carriers and transfer the sheets directly to successive surfaces on the impression cylinder.

l2. In a sheet feed rotary printing press, an impression cylinder having an odd number of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, and a common rotary sheet transfer carrier arranged to alternate- 1y take the sheets directly from the two sheet feed carriers at different points on the transfer carrier and transfer the sheets directly to successive surfaces on the impression cylinder.

3. En a sheet feed rotary printing press, an impression cylinder having an odd number of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, a common rotary sheet transfer carrier arranged to alternately take the sheets directly from the two sheet feed carriers and transfer the sheets directly to successive surfaces on the impression cylinder, and means, controlled by the failure of a ,sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a printed sheet thereon beyond its delivery point.

'14. In 'a sheet feed rotary printing press, an impression cylinder having an odd number of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, a common rotary sheet transfer carrier arranged to alternately take the sheets directly from the two sheet feed carriers at different points on the transfer carrier and transfer the sheets directly to successive surfaces on the impression cylinder, and means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a printed sheet thereon beyond its delivery point.

15. In a sheet feed rotary printing press. an

impression cylinder having an odd number of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, a common rotary sheet transfer carrier arranged to take the sheets from the two sheet feed carriers and transfer the sheets to successive surfaces on the impression cylinder, and electrically operated means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a printed sheet thereon beyond its delivery point.

16. In a 'sheet feed rotary printing press, an impression cylinder having an odd number of impression surfaces, two sources of sheet supply, two rotary sheet feed carriers, a common rotary sheet transfer carrier arranged to take the sheets from the two sheet feed carriers at different points on the transfer carrier and transfer the sheets to successive surfaces on the impression cylinder, and electrically operated means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a printed sheet .thereon beyond its delivery point. l

17. In a sheet feed rotary printing press, an impression cylinder having a plurality of impression surfaces, a rotary carrier arranged to take sheets and transfer them successively directly to successive impression cylinder surfaces, and electrically operated means, controlled by the failure of a sheet to be taken by the transfer carrier, for causing the impression cylinder to retain a previously printed sheet thereon beyond its delivery point.

i3, In a sheet feed rotary printing press, an

impression cylinder having a plurality of irnpression surfaces, its grippers, a rotary carrier, its grippers arranged to alternately take sheets directly from two sources and transfer the sheets directly to successive impression cylinder grippers a rotary delivery carrier, its grippers arranged to take the sheets fom the impression cylinder grippers, movable cams for causingthe operation of the grippers on the transfer carrier, impression cylinder and delivery carrier, and means, controlled by the failure of a sheet to be taken by the transfer carrier, for moving the gripper cams to render the grippers inoperative at their sheet transfer points.

19. In a sheet feed rotary printing press, an impression cylinder, its grippers, a rotary carrier,

its grippers arranged to take sheets from two sources and transfer the sheets successively to the limpression cylinder grippers, a rotary delivery the transfer carrier, for moving the gripper cams V to render the grippers inoperative at their sheet transfer points.

HOWARD M. BARBER. 

